Linux Commands Examples

A great documentation place for Linux commands

stdbuf

Run COMMAND, with modified buffering operations for its standard streams.

Synopsis

stdbuf OPTION... COMMAND


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examples

0

tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
This will immedidately display unique entries from access.log


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source
            
stdbuf -o0 ./at_computer.py | tee --append tmp.txt
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source
            
echo running genTrainMetrics
stdbuf -o0 python genTrainMetrics.py
echo
echo running genTestMetrics
echo running genTestMetrics
stdbuf -o0 python genTestMetrics.py
echo
echo running ordering
stdbuf -o0 python ordering.py
echo
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source
            
exec stdbuf -i0 -o0 -e0 "$@"
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source
            
echo running genTrainMetrics
stdbuf -o0 python genTrainMetrics.py
echo
echo running genTestMetrics
stdbuf -o0 python genTestMetrics.py
echo running ordering
stdbuf -o0 python ordering.py
echo
echo running driver
stdbuf -o0 python driver.py
echo
# echo running submission

description

Run COMMAND, with modified buffering operations for its standard streams.

Mandatory arguments to long options are mandatory for short options too.
-i
, --input=MODE

adjust standard input stream buffering

-o, --output=MODE

adjust standard output stream buffering

-e, --error=MODE

adjust standard error stream buffering

--help

display this help and exit

--version

output version information and exit

If MODE is ’L’ the corresponding stream will be line buffered. This option is invalid with standard input.

If MODE is ’0’ the corresponding stream will be unbuffered.

Otherwise MODE is a number which may be followed by one of the following: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y. In this case the corresponding stream will be fully buffered with the buffer size set to MODE bytes.

NOTE: If COMMAND adjusts the buffering of its standard streams (’tee’ does for e.g.) then that will override corresponding settings changed by ’stdbuf’. Also some filters (like ’dd’ and ’cat’ etc.) don’t use streams for I/O, and are thus unaffected by ’stdbuf’ settings.

copyright

Copyright © 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

reporting bugs

Report stdbuf bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report stdbuf translation bugs to <http://translationproject.org/team/>


bugs

On GLIBC platforms, specifying a buffer size, i.e. using fully buffered mode will result in undefined operation.


see also

The full documentation for stdbuf is maintained as a Texinfo manual. If the info and stdbuf programs are properly installed at your site, the command

info coreutils 'stdbuf invocation'

should give you access to the complete manual.


author

Written by Padraig Brady.

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